[Jprogramming] plot and paint demo

[Henry Rich]

Please, help us by updating the wiki.  At this moment you know more 
about this misdescription than anyone else.

Henry Rich

On 3/12/2023 10:01 PM, More Rice wrote:
>> I still couldn't find the equivalent of xticklabels
> Ok. Figured it out.  The description of xlabel in jwiki is wrong - It is
> not "datapoint" (based on the error message, it should be "one label per
> tic position").
> xlabel* c [#none ] x labels (one label per datapoint)
> It works wonderfully.  Thank you very much for the package!
>
> thank you.
>
> Maurice
>
> On Sun, Mar 12, 2023 at 5:53 PM More Rice <mrmorerice at gmail.com> wrote:
>
>> Thank you, Rob.  I (could easily find and) read those links before
>> my initial ques email. I'll give you the longer story.
>>
>> I had issue reconciling what I read from 2 sources:
>>
>> A. From calculus.pdf, page 7 - more than 1 plot types are given to the
>> plot verb as its x argument:
>>
>> load 'plot'
>> PLOT=:’stick,line’&plot
>> PLOT t;h
>>
>> B. From the Plot/Verbs page (https://code.jsoftware.com/wiki/Plot/Verbs),
>> it said they should be separated by semicolons. Then, where does the comma
>> come from?
>>
>> So, I thought the documentation was no longer up-to-date.  And the
>> following experiments caused me further confusion:
>>
>> 'stick,line ; yrange _2 2 ; xtic 1p1 3' plot _2p1 2p1 ; 'sin'  NB. works
>>
>> 'yrange _2 2 ; xtic 1p1 3 ; stick,line' plot _2p1 2p1 ; 'sin'  NB. doesn't
>>
>> |option not found: stick,line: signal
>>
>> | signal'option not found: ',j
>>
>>
>> I read some more this morning, and did more experiments.  It seems
>> 'stick,line' belongs to the type option, and by default (only in the
>> beginning of x), plot assumes type's value string (and the comma is
>> actually optional). If we need to put them aside from the beginning of x,
>> we seem to have to explicitly use the type option keyword.
>>
>> 'yrange _2 2 ; xtic 1p1 3 ; type stick,line' plot _2p1 2p1 ; 'sin'  NB.
>> works
>>
>>
>> This for pointing me back to the jwiki for a second look to figure this
>> out.
>>
>> That said, I still couldn't find the equivalent of xticklabels (
>> https://www.mathworks.com/help/matlab/ref/xticklabels.html) in J yet.
>> Not yet implemented?
>>
>>
>> thank you.
>>
>> Maurice
>>
>> On Sun, Mar 12, 2023 at 3:02 AM 'robert therriault' via Programming <
>> programming at jsoftware.com> wrote:
>>
>>> Hi Maurice,
>>>
>>> With respect to finding the documentation on the wiki, have you looked at
>>> https://code.jsoftware.com/wiki/Plot and in particular
>>> https://code.jsoftware.com/wiki/Plot/Options
>>>
>>> A lot of the fine tuning of Plot seems to be done through pd. The
>>> Development section of the plot page may also give you some useful
>>> information.
>>>
>>> My apologies if you have already looked at them and found them wanting,
>>> but when you said you did not find the doc in the wiki, I just wanted to be
>>> sure that you were aware of these.
>>>
>>> Cheers, bob
>>>
>>>> On Mar 11, 2023, at 22:07, More Rice <mrmorerice at gmail.com> wrote:
>>>>
>>>> Hi,
>>>>
>>>> some questions, if I may ...
>>>>
>>>> 1. plot can't handle asymptote (or "not in domain" issue) right at the
>>>> boundary in its domain?
>>>>
>>>> install 'all'
>>>>
>>>> load 'plot trig numeric'
>>>>
>>>> plot _5 5 ; '%' NB. ok
>>>>
>>>> plot _5 0 ; '%' NB. Bad
>>>>
>>>> |NaN error: plotfintvl
>>>>
>>>> | bakproj=.({:"1 zvals),~"0 1(}."1 zvals) -(}."1 secant)*"1 intsize
>>>>
>>>> plot 0 5 ; '%' NB. Bad
>>>>
>>>> |NaN error: plotfintvl
>>>>
>>>> | fwdproj=.({."1 zvals),"0 1(}:"1 zvals) +(}:"1 secant)*"1 intsize
>>>>
>>>> plot  0 10; '%:'  NB. ok
>>>>
>>>> plot _1 10; '%:'  NB. Bad
>>>>
>>>> |domain error: plotsubd
>>>>
>>>> | mtone1=.
>>>> (<./@:((((i.&0)@:(2&(<:/\)))>.((i.&0)@:(2&(>:/\))))"1))@(1&{::)"1 d
>>>>
>>>> JVERSION
>>>>
>>>> Engine: j903/j64avx2/windows
>>>>
>>>> Release-b: commercial/2022-01-28T04:09:50
>>>>
>>>> Library: 9.03.08
>>>>
>>>> Qt IDE: 1.9.5s/5.15.2(5.15.2)
>>>>
>>>> Platform: Win 64
>>>>
>>>> Installer: J903 install
>>>>
>>>> InstallPath: c:/users/myself/software/j903
>>>>
>>>> Contact: www.jsoftware.com
>>>>
>>>>
>>>>
>>>> 2. I'm trying to control plot's y-scale and x-/y-tick labels. I don't
>>> see
>>>> its doc in jwiki nor calculus.pdf.  So, I tried scrolling through
>>>> Help|Studio|Showcase...|plot to see if they're possible; but still
>>>> nothing.  For example, instead of a numeric value, I want to do 0, +/-
>>>> 1p1, +/- 2p1, etc.  Can it be done?
>>>>
>>>>
>>>> 3. While looking for solution to #2, I stumbled upon a bug:
>>>> Help|Studio|Showcase...|isigraph.  Repeatedly pressing F12 till you see
>>>> 'Screen Roller' (yes, ignore Paint Demo and just hit another F12).  Once
>>>> you reach this stage, Paint Demo will relaunch if you try to exit the
>>>> window. In the end, I've to kill the jqt to get out of the demo.
>>>>
>>>>
>>>> thanks
>>>>
>>>>
>>>> Maurice
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